I used Blockfolio first, but then deleted it after a while. It annoyed me that there were always disturbances.
Sometimes the app could not establish a connection to the server. No matter how many times I have updated.
It was not my internet connection.

Then I used Delta. I found this app very good. I like how the prices are presented.
The app was also very well structured and very quick to understand. I have no connection problems with the app.
Now I no longer have an app on my phone because I do not want to be distracted that often.
I do not want to pay attention to the prices so often. They fall and rise anyway they want.
I have no influence on that and it would only drive me crazy.